Insertible teeth for saw-blades.



PATENTED JULY 30, 1907.

G. A. JUENGST. INSERTIBLE TEETH FOR SAW BLADES.

APPLICATION FILED APR. 19,1905.

INVENTU 1 26% Q.

r n/ 50a I Any UNITED STATES PATENT OFFICE.

CHARLES A. JUENGST, OF CROTON FALLS, NEW YORK, ASSIGNOR TO HIGLEY MACHINE COMPANY, OF CROTON FALLS, NEW YORK, ACORPORATION OF NEW YORK.

' INSERTIBLE TEETH FOR SAW-BLADES.

To all whom 'it may concern:

Be it known that 1, CHARLES A. JUENGs'r, a citizen of the United States, residing at Croton Falls, in the county of Westchester and State of New York, have invented an Improvement in Insertible Teeth for Saw- Blades, of which the following is a specification.

My invention relates to saws with removable teeth, especially adapted for cutting metal. Heretofore the teeth of these saws have been inserted at equal spaced apart intervals, and it has been difiicult to secure them firmly in position in the saw blade or disk. In sawing metal there is a perceptible vibratory movement of the work which is in unison with the equal spaced apart intervals of the teeth, and the tendency of this movementis to cause a wavy line of cut, which affects the speed of the 'saw, and the object of my invention is to obviate this difficulty. 1

In carrying out my invention I aim to destroy this vibratory movement and wavy line of cut by placing tooth to the blade by preventing the same turning and of holding the forward line ofscrew-threads so firmly in mesh that the cutting action has no tendency to lift the tooth; the tooth is also widened on the cutting face for effecting a clearance in the work.

In the drawing, Figure 1 is an elevation showing a portion of a. saw blade or disk with a number of teeth' in position, and a section of the blade at the place for one tooth which has been omitted. Fig. 2 is a section on the plane of the saw blade or disk with a tooth and its holding key in position. Fig. 3 is a plan of the parts shown in Fig. 2, and Fig. 4 is an elevation of the forward portion of the tooth.

a represents a portion of the saw blade or disk prd vided with sockets a, which, by preference are drilled radially into the edge of the blade or'disk and tapped to form screw-segment edges 2, 3.' One of these edges,

that is, the one coming to the hack of the tooth, is pro- Specification of Letters Patent. I Application filed April 19,1905. Serial No. 266,875.

Patented July 30, 1907.

with the thickness of the saw-blade or disk. Opposite sides of the tooth 7,- 8 are curved to agree with the arc of the forming the sockets a and these sides or surfaces 7, 8 are formed with segment threads, so that the tooth may be screwed into the sockets to place. Thescrew-segment side 7 of each toothis provided with a central key-way 9, and when the tooth is in position a key 0 is passed down through the key-ways 4 and 9 and is driven to place, securing the tooth in position: each tooth is inserted in like manner.

The teeth are made with cutting edges 10 and the head b of the teeth is tapered from the cutting edge back to the heel, as will appear from Figs. 1 and 2. This tapering head b is also tapering at the opposite sides from the heel forward to the cutting edge, for the cutting edge is made wider so that there shall be clearance in action.

Referring to Fig. 1 it will be noticed that the four teeth x, form' a series and that the teeth y, belong to a second series. The four teeth y, are set at varying distances apart-that is to say-the third tooth fromthe right is a less distance from the second tooth than the second tooth is from the first, and the fourth tooth is a less distance from the third than the third is from the second. On the other hand, the first tooth y, is the same distance from the last ,or fourth tooth x, as the second tooth m, is from the first. These varying distances are maintained between the respective teeth of each series, and I prefer each series. to consist of at least three or four teeth. The distance between the last tooth of a series and the first tooth of an adjoining series may be the same or greater than the distance between the first two teeth of a series. By thus spacing the teeth at varying distances apart I destroy the vibratory movement of the work and consequently the =wavy line of cut in the work produced by theteeth,

said line of out being substantially even and regular and it being possible in this manner to cut more rapidly,

as the retarding actionproduced by the vibratory longed as well as producing an increase in the amount of material that the saw can cut in a given space of time. i I

To remove a tooth and insert another in its place, an instrumentjis to be inserted below the lower end of 7 its key 0, in the recess a, and the key raised and removed, after which the tooth may be rotated until removed and a new one inserted in the reverse manner.

I claim as my invention:

1. The combination with a saw-blade having radially disposed open-sided sockets with threaded edges, of insertible teeth having flat parallel sided screw-threaded shanks, and means for securing the teeth In the saw-blade against rotation.

2. The combination with a saw-blade having radially disposed open-sided sockets with threaded edges, of insertibie teeth with shanks having flat parallel sides and curved screw-segment edges, '21 key-way in one threaded edge of said socket and a second key-way in the adjacent threaded edge of the tooth shank, and a key received in said key-ways and acting to hold the tooth in place.

3. The combination'with the saw blade having radially disposed peripheral sockets with threaded edges, 0! insertible teeth having fla't parallel sides and .,eurved screw segment edges adapted to be screwed into said sockets and means for securing the teeth in place and preventing them' turning.

disposed peripheral sockets with threaded edges and an 15 intermedi 'te key-way in one of said' edges, of insertible teeth hav. flat parallel sides and curved screw segment edges ada d to be screwed into said sockets and having a prey-way in rmedia'te of one screw segment edge, and keys fitting said Key-ways to secure the teeth in position and 20 prevent thsame turning.

Signed by me thisfourteenth day of April 1905'.

CHAS. A. JUENGST. Witnesses GEO. T. Pmcxu'mr, S. T. HAVILANn, 

